// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'dart:ui' show TextDirection; import 'package:flutter/semantics.dart'; import 'package:flutter/services.dart' show SystemChannels; import 'package:flutter_test/flutter_test.dart'; void main() { TestWidgetsFlutterBinding.ensureInitialized(); test('Semantic announcement', () async { final List<Map<dynamic, dynamic>> log = <Map<dynamic, dynamic>>[]; Future<dynamic> handleMessage(dynamic mockMessage) async { final Map<dynamic, dynamic> message = mockMessage as Map<dynamic, dynamic>; log.add(message); } TestDefaultBinaryMessengerBinding.instance!.defaultBinaryMessenger.setMockDecodedMessageHandler<dynamic>(SystemChannels.accessibility, handleMessage); await SemanticsService.announce('announcement 1', TextDirection.ltr); await SemanticsService.announce('announcement 2', TextDirection.rtl); expect(log, equals(<Map<String, dynamic>>[ <String, dynamic>{'type': 'announce', 'data': <String, dynamic>{'message': 'announcement 1', 'textDirection': 1}}, <String, dynamic>{'type': 'announce', 'data': <String, dynamic>{'message': 'announcement 2', 'textDirection': 0}}, ])); }); }